Find a Provider

Emergency Department


 Nathan Donaldson, DO, MHA, FACEP, Emergency Department Chief

The Care You Need, Close to Home.

Mount Desert Island Hospital’s Emergency Department, supported by an active collaboration with Penn Medicine, is available 24/7. We are a critical link in Downeast Maine’s trauma delivery system, working closely with Lifeflight of Maine to aid in the timely transfer of critically ill and injured patients.

Our ED team is led by Nathan Donaldson, DO, MHA, FACEP. Dr. Donaldson is a board-certified emergency physician who also has a background in sports medicine, having previously served as a physician for the San Jose Sharks. Dr. Donaldson is joined by a skilled team of emergency room nurses, physician assistants and a full-time Hospitalist. Orthopedic and general surgeons are on staff should the need arise. In-house diagnostic imaging, laboratory and pharmacy, and a 25-bed inpatient facility with Intensive Care and Skilled Rehabilitation Units all support MDI Hospital’s emergency medical services.

In recent years, life-saving new technologies have been brought to MDI Hospital through our collaborative program with Penn Medicine, one of the nation’s largest, most renowned providers of emergency medicine. In many cases, these technologies were innovated by our Penn Med partners. Throughout each summer, as our Island enters its busiest tourist season, four teams (each with a physician, resident, and RN) travel from Penn Med to our Hospital for two-week rotations in the ED. Working side-by-side with MDI Hospital’s skilled staff, they enhance our delivery of care while experiencing the day-to-day caregiving of a rural community hospital that is ranked as one of the nation’s best.

“The forward-thinking and talented physicians, nurses, and staff of Mount Desert Island Hospital are wonderful partners. It has been a pleasure to collaborate on implementing revolutionary, in some cases life-saving, procedures and technology, and to see these now routinely used in Maine.”

-Larry Jameson, MD, PhD, Dean, Perelman School of Medicine, University of Pennsylvania


10 Wayman Lane
Bar Harbor, ME 04609


207 288-5081
24-Hour ER 207 288-8439

Emergency Department Providers
Brenda Beckett, PA-C
Physician Assistant
Michelle Kaplan, PA-C
Michelle R. Kaplan, PA-C
Emergency Medicine
Mahan, William (Guy), PA-C
William (Guy) Mahan, PA-C
Physician Assistant
Gordon Murphy, PA-C
Physician Assistant
Everett Steinbarger, PA-C
Physician Assistant